🚀 go-pugleaf

>Caution is advised if you have an electronic ignition system on your car.
>Some cheaper models can turn into smoke when jump-starting.  Disconnecting
>the positive terminal of the helping car should make things safe, 
It's not clear if he means disconnect the jumper cable, or the
*battery* cable.

NEVER disconnect the battery on a running car. This is referred
to as a "load dump" and generates the worst possible transient
voltages. The battery is an essential low impedance element at
frequencies above DC. Without it, the inductance of the field is
such that the electronics will be history before the voltage
regulator can get things down to where they belong.

The best way to avoid problems is patience. Hook up the cars.
Sit and let the weak one charge for a while. (10 minutes maybe)
Once the other car is running, you can let the good car idle
down, and maybe if you want, turn on all of its loads: headlights,
heater, etc. Them disconnect the cables.

For more details on load dumps, see the GE MOV Engineering
Handbook.

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